A fantastical group of cliffside stairways, bridges, and twisting paths carved out of stone provide a surreal coastal hike.

360° views of the city plus five floors of optical illusions and hands-on science.

Fall down the rabbit hole into a surreal journey of human consciousness "from ass to soul."

Hundreds of hidden passageways weave through the old quarters of Lyon.

A complex, nine-layer maze on the grounds of a Venetian doge's playground.

The longest hedge maze in the world.

One of the greatest maze designer’s greatest mazes.

Beautiful carved tunnels.

Giant statue of a disembodied head.

A clear example of the process of erosion in action.

An opal mining town in the middle of Australia where people live, worship, and shop underground.

Tubing through a cave lit with glowworms is a magical underground experience.

The real life Hobbiton, this sheep farm has been forever transformed since being built for The Hobbit film series.

A 30-acre garden inspired by the principles of modern physics.

Vortex-shaped aquarium hosts Europe's largest school of piranhas and other ocean creatures.

Museum precariously perched on a massive yellow pillar.